internal/rosa/go: require popcnt for x86

This backports https://go.dev/cl/746640.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/rosa/go.go

@@ -151,6 +151,9 @@ rm \
 sed -i \
 	's,/lib/ld-musl-`+linuxArch()+`.so.1,/system/bin/linker,' \
 	cmd/link/internal/`+runtime.GOARCH+`/obj.go
+sed -i \
+	's/cpu.X86.HasAVX512VBMI/& \&\& cpu.X86.HasPOPCNT/' \
+	internal/runtime/gc/scan/scan_amd64.go
 
 rm \
 	os/root_unix_test.go